/Engine/Source/Editor/StaticMeshEditor/Public/StaticMeshEditorSubsystem.h
Removes the UV channel at the specified channel index on the given LOD of a StaticMesh.
true if the UV channel was removed.
bool RemoveUVChannel ( [UStaticMesh](API\Runtime\Engine\Engine\UStaticMesh) * StaticMesh, int32 LODIndex, int32 UVChannelIndex )